1. The safety of nitrous oxide analgesia;McCarthy;J Mich Dent Assoc,1969
2. Differences in metered and measured oxygen concentrations during nitrous oxide analgesia;Gauert;Anesth Analg,1968
3. Evaluation of demand-flow anesthetic machines in dental practice;Allen;JADA,1969
4. Appraisal of the demand-flow anesthetic machine and review of the literature;McCarthy;J Oral Surg,1969